The full license is available at http://creativecommons.org/licenses/by/3.0/
Below is a transcript of the most important points.

You are free:
	to Share - to copy, distribute and transmit the work
	to Remix - to adapt the work

Under the following conditions:
	Attribution - You must attribute the work in the manner specified by the
		author or licensor (but not in any way that suggests that they endorse you
		or your use of the work).

With the understanding that:
	Waiver - Any of the above conditions can be waived if you get permission from
		the copyright holder.
	Other Rights - In no way are any of the following rights affected by the
		license:
			- Your fair dealing or fair use rights;
			- The author's moral rights;
			- Rights other persons may have either in the work itself or in how the
			  work is used, such as publicity or privacy rights.
	Notice - For any reuse or distribution, you must make clear to others the
		license terms of this work.
